TWI590110B - Touch panel - Google Patents

Description

Touch panel

The present invention relates to a touch panel, and more particularly to a touch panel in which the area of the sensing electrode varies with the cover.

Since the user operates the panel in a touch-sensitive manner, it is quite intuitive and convenient, and the touch panel is favored by consumers, and gradually emerges in the market of electronic products.

The touch panel can be roughly divided into a resistive touch panel or a capacitive touch panel, and the operation principle is different. The resistive touch panel comprises a glass panel, a conductive layer and a resistive metal layer. When the user touches the panel, the conductive layer and the resistive metal layer are brought into contact, and the amount of current and the magnitude of the electric field are changed to be regarded as a contact event, and then the signal is transmitted to the controller for processing.

Capacitive touch panels use capacitive sensors for detection. When the user touches the screen, a continuous current is passed through the sensor, allowing the sensor to accurately store the electrons horizontally and vertically to form a precisely controlled capacitive field. When the finger touches a different position, the capacitive field of the sensor is changed by another capacitive location. At this time, the circuit in each corner of the panel calculates the degree of change of the electric field, and then transmits the contact event signal to the controller. deal with.

As consumers demand higher quality of touch panels, the sensitivity and accuracy of touch sensing need to be improved to meet market demand.

The invention relates to a touch panel. The area of the sensing electrode of the touch panel is related to the thickness of the cover plate, and can compensate for the problem that the induced capacitance is different due to the uneven thickness of the cover plate.

According to an aspect of the invention, a touch panel includes a substrate, a plurality of first sensing electrodes, a plurality of second sensing electrodes, an insulating layer, and a cover. The first sensing electrodes are disposed on the substrate and arranged in a first direction. The second sensing electrodes are disposed on the substrate and arranged in a second direction, the first direction being different from the second direction. The insulating layer is disposed between the first sensing electrode and the second sensing electrode. The cover plate is disposed on the insulating layer, and the cover plate has a non-uniform thickness. The surface area of the first sensing electrode and the surface area of the second sensing electrode are at least related to the non-uniform thickness of the cover.

In order to better understand the above and other aspects of the present invention, the preferred embodiments are described below, and in conjunction with the drawings, the detailed description is as follows:

First embodiment

FIG. 1A is a partial cross-sectional view of the touch panel 10 according to an embodiment of the invention. Referring to FIG. 1A , the touch panel 10 includes a substrate 100 , a first sensing electrode 120 , a second sensing electrode 125 , an insulating layer 140 , a protective layer 160 , an adhesive layer 165 , and a cover plate 180 . The first sensing electrode 120 and the second sensing electrode 125 are staggered and disposed on the substrate 100 . The insulating layer 140 is disposed between the first sensing electrode 120 and the second sensing electrode 125. The protective layer 160 is disposed on the insulating layer 140, and the adhesive layer 165 is used to fix the protective layer 160. The cover plate 180 is disposed on the insulating layer 140 with the cover plate 180.

The cover plate 180 is, for example, a scratch-resistant layer covering the top of each layer structure for protection purposes. In this embodiment, the cover plate 180 has a non-uniform thickness. The cover plate 180 has, for example, a first zone I, a second zone II and a third zone III, the first zone I has a first thickness L1, the second zone II and the third zone III have a second thickness L2, and the first thickness L1 is greater than the second thickness L2.

FIG. 1B is a top view of the touch panel 10 according to an embodiment of the invention. A partial cross-sectional view of the touch panel 10 in FIG. 1A is, for example, a cross section cut by a tangent line 1-1 of FIG. 1B. It is to be noted that the first sensing electrode 120 and the second sensing electrode 125 are illustrated in FIG. 1B. Arrangement. Referring to FIG. 1B , the first sensing electrodes 120 are disposed on the substrate 100 and arranged in a first direction X. The second sensing electrodes 125 are disposed on the substrate 100 and arranged in a second direction Y.

The first sensing electrode 120 can include a first sub-electrode 1222, a first connection 1224, a second sub-electrode 1242, and a second connection 1244. The first connection 1224 is configured to electrically connect the adjacent first sub-electrode 1222. The second connection 1244 is configured to electrically connect the adjacent second sub-electrode 1242. The second sensing electrode 125 can include a third sub-electrode 1262, a third connection 1264, a fourth sub-electrode 1282, and a fourth connection 1284. The third connection 1264 is configured to electrically connect the adjacent third sub-electrode 1262. The fourth connection 1284 is configured to electrically connect the adjacent fourth sub-electrode 1282. The first sub-electrode 1222, the second sub-electrode 1242, the third sub-electrode 1262, and the fourth sub-electrode 1282 are, for example, diamond-shaped.

In one embodiment, the diagonal width of the first sub-electrode 1222 and the third The diagonal width of the sub-electrode 1262 is, for example, W1, the diagonal width of the second sub-electrode 1242 and the diagonal width of the fourth sub-electrode 1282 are, for example, W2, and the width W1 is greater than the width W2. Therefore, the surface area A11 of the first sub-electrode 1222 is greater than the surface area A12 of the second sub-electrode 1242, and the surface area A13 of the third sub-electrode 1262 is greater than the surface area A14 of the fourth sub-electrode 1282. The first sub-electrode 1222, the second sub-electrode 1242, the third sub-electrode 1262, and the fourth sub-electrode 1282 are, for example, transparent electrodes.

Referring to FIGS. 1A and 1B simultaneously, the surface areas of the first sensing electrode 120 and the second sensing electrode 125 are related to the non-uniform thickness of the cover plate 180. For example, the cover plate includes a first zone I, a second zone II, and a third zone III. The thickness of the first zone I is, for example, L1, and the thickness of the second zone II and the third zone III is, for example, L2, and the thickness L1. Greater than the thickness L2. In this embodiment, the cover plate 180 is thicker along the intermediate section on the Y-axis, and the side section is a thinner curved cover. That is, the first zone I is located between the second zone II and the third zone III. However, in other embodiments, the cover plate 180 may also have a wave shape or other shape, and the relative positions of the first region I, the second region II, and the third region III of the cover plate 180 are not limited.

As shown in FIG. 1B, the first region I of the cover covers the first sub-electrode 1222 and the third sub-electrode 1262, for example, and the second region II and the third region III of the cover cover the second sub-electrode 1242, for example. The fourth sub-electrode 1282. The distance between the first sub-electrode 1222 and the third sub-electrode 1262 covered by the first region I of the cover is, for example, S1, and the distance between the second sub-electrode 1242 and the fourth sub-electrode 1282 covered by the third region III of the cover is, for example. S2, and the spacing S1 is smaller than the spacing S2.

Second embodiment

FIG. 2A is a partial cross-sectional view of the touch panel 20 according to an embodiment of the invention. Referring to FIG. 2A , the touch panel 20 includes a substrate 100 , a first sensing electrode 220 , an insulating layer 140 , a protective layer 160 , an adhesive layer 165 , and a cover plate 180 . The second FIG. 2A is cut along the direction of the first sensing electrode 220 of the touch panel 20, and therefore, only the cross section of the first sensing electrode 220 is seen. The touch panel 20 is similar to the touch panel 10 of the first embodiment, and the same components are denoted by the same reference numerals and will not be described again.

As shown in FIG. 2A, the first connection 2224 is electrically connected to the adjacent first sub-electrode 2222, and the second connection 2244 is electrically connected to the adjacent second sub-electrode 2242. The width of the first sub-electrode 2222 is W11, the width of the second sub-electrode 2242 is W12, and the width W11 is greater than the width W12. In other words, the dimensions of the first sub-electrode 2222 and the second sub-electrode 2242 are related to the non-uniform thickness of the cap plate 180. For example, the cover plate 180 includes a first zone I, a second zone II, and a third zone III (shown in FIG. 2D). The thickness of the first zone I is, for example, L1, the second zone II, and the third zone III. The thickness is, for example, L2, and the thickness L1 is greater than the thickness L2.

FIG. 2B is another partial cross-sectional view of the touch panel 20 according to an embodiment of the invention. Please refer to FIG. 2B , which is cut along the direction of the second sensing electrode 225 of the touch panel 20 , so only the cross section of the second sensing electrode 225 is seen. In fact, the first sensing electrode 220 (shown in FIG. 2D) and the second sensing electrode 225 are staggered and disposed on the substrate 100. The touch panel 20 is similar to the touch panel 10 of the first embodiment, and the same components are denoted by the same reference numerals and will not be described again.

As shown in FIG. 2B, the width of the third sub-electrode 2262 is W21, The width of the four sub-electrodes 2282 is W22, and the width W21 is greater than the width W22. In other words, the dimensions of the third sub-electrode 2262 and the fourth sub-electrode 2282 are related to the non-uniform thickness of the cover plate 180.

FIG. 2C is another partial cross-sectional view of the touch panel 20 according to an embodiment of the invention. Please refer to FIG. 2C , which is cut along the staggered direction of the first sensing electrode 220 and the second sensing electrode 225 of the touch panel 20 , so that the first sensing electrode 220 and the second sensing electrode can be simultaneously seen. Partial section of 225. The touch panel 20 is similar to the touch panel 10 of the first embodiment, and the same components are denoted by the same reference numerals and will not be described again.

As shown in FIG. 2C, the pitch of the first sub-electrode 2222 and the third sub-electrode 2262 is S3, and the pitch of the second sub-electrode 2242 and the fourth sub-electrode 2282 is S4, and the pitch S4 is greater than the pitch S3. In other words, the spacing between the first sub-electrode 2222, the second sub-electrode 2242, the third sub-electrode 2262, and the fourth sub-electrode 2282 is also related to the non-uniform thickness of the cap plate 180.

FIG. 2D is a top view of the touch panel 20 according to an embodiment of the invention. Referring to FIG. 2A to FIG. 2D, a partial cross-sectional view of the touch panel 20 of FIG. 2A is, for example, a cross-section cut by a tangent 2-2 of FIG. 2D, and a touch panel 20 of FIG. 2B. A partial cross-sectional view, for example, is depicted by a section cut by a tangent 3-3 of FIG. 2D, and a partial cross-sectional view of the touch panel 20 of FIG. 2C is, for example, cut by a tangent 4-4 of FIG. 2D. The section is drawn. Only the substrate 100, the first sensing electrode 220 and the second sensing electrode 225 of the touch panel 20 are shown in FIG. 2D for convenience of description.

Referring to FIG. 2D, the first sensing electrode 220 is disposed on the substrate 100. And arranged in a first direction X. The second sensing electrodes 225 are disposed on the substrate 100 and arranged in a second direction Y. The touch panel 20 is similar to the touch panel 10 of the first BB, except that the shapes and settings of the first sensing electrode 220 and the second sensing electrode 225 are different. In this embodiment, the cover plate 180 is thicker in the middle section of the X-axis, and the side section is a thin curved cover plate, and the first zone I is located between the second zone II and the third zone III. However, in other embodiments, the cover plate 180 may also have a wave shape or other shape, and the relative positions of the first region I, the second region II, and the third region III of the cover plate 180 are not limited.

The first sensing electrode 220 can include a first sub-electrode 2222, a first connection line 2224, a second sub-electrode 2242, and a second connection 2244. The first connection line 2224 is configured to electrically connect the adjacent first sub-electrode 2222. The second connection 2244 is configured to electrically connect the adjacent second sub-electrode 2242. The second sensing electrode 225 can include a third sub-electrode 2262, a third connection 2264, a fourth sub-electrode 2282, and a fourth connection 2284. The third connection 2264 is configured to electrically connect the adjacent third sub-electrode 2262. The fourth connection 2284 is used to electrically connect the adjacent fourth sub-electrode 2282.

The first sub-electrode 2222 and the second sub-electrode 2242 are, for example, rhombic, and the third sub-electrode 2262 and the fourth sub-electrode 2282 are, for example, hexagonal. Four symmetrical triangular electrodes 2226 and triangular electrodes 2246 may be respectively disposed around the third sub-electrode 2262 and the fourth sub-electrode 2282. In another embodiment, the triangular electrode 2226 and the triangular electrode 2246 may not be provided, and are not limited.

Referring to FIGS. 2A-2D simultaneously, the surface areas of the first sensing electrode 220 and the second sensing electrode 225 are related to the non-uniform thickness of the cover plate 180. For example, the thickness of the first region I of the cover plate 180 is, for example, L1, a cover plate. The thickness of the second zone II and the third zone III of 180 is, for example, L2, and the thickness L1 is greater than the thickness L2. The diagonal width of the first sub-electrode 2222 is, for example, W11, the diagonal width of the second sub-electrode 2242 is, for example, W12, the width of the third sub-electrode 2262 is, for example, W21, and the width of the fourth sub-electrode 2282 is, for example, W22. And the width W11 is greater than the width W12, and the width W21 is greater than the width W22.

In this embodiment, the surface area A21 of the first sub-electrode 2222 is greater than the surface area A22 of the second sub-electrode 2242, and the surface area A23 of the third sub-electrode 2262 is greater than the surface area A24 of the fourth sub-electrode 2282. The first sub-electrode 2222, the second sub-electrode 2242, the third sub-electrode 2262, and the fourth sub-electrode 2282 are, for example, transparent electrodes. In this embodiment, the cover plate 180 is a curved cover plate which is thicker in the middle and thinner on the side, and the first zone I is located between the second zone II and the third zone III. However, in other embodiments, the cover plate 180 may also have a wave shape or other shape, and the relative positions of the first region I, the second region II, and the third region III of the cover plate 180 are not limited.

As shown in FIG. 2D, the first region I of the cover plate 180 covers, for example, the first sub-electrode 2222 and the third sub-electrode 2262, and the second region II and the third region III of the cover plate 180 cover the second sub-electrode, for example. 2242 and fourth sub-electrode 2282. The distance between the first sub-electrode 2222 and the third sub-electrode 2262 covered by the first region I of the cover plate 180 is, for example, S3, the second sub-region II of the cover plate 180, and the second sub-electrode 2242 and the fourth region covered by the third region III. The pitch of the sub-electrodes 2282 is, for example, S4, and the pitch S3 is smaller than the pitch S4.

Third embodiment

FIG. 3A is a partial cross-sectional view of the touch panel 30 according to an embodiment of the invention. Referring to FIG. 3A, the touch panel 30 includes a substrate. 100. The first sensing electrode 320 (shown in FIG. 3D), the second sensing electrode 325, the insulating layer 340, the protective layer 160, the adhesive layer 165, and the cover plate 180. In this embodiment, the first sensing electrode 320 and the second sensing electrode 325 are staggered and disposed on the substrate 100. 3A is cut along the direction of the second sensing electrode 325 of the parallel touch panel 30, only a partial cross section of the second sensing electrode 325 is seen, and a part of the structure is omitted.

As shown in FIG. 3A, the length of the third sub-electrode 3262 is L21, the length of the fourth sub-electrode 3282 is L22, and the length L21 is greater than the length L22. The dimensions of the third sub-electrode 3262 and the fourth sub-electrode 3282 are related to the non-uniform thickness of the cover plate 180. For example, the cover plate 180 includes a first zone I and a second zone II (shown in FIG. 3D), the thickness of the first zone I is, for example, L1, the thickness of the second zone II is, for example, L2, and the thickness L1 is greater than Thickness L2. In this embodiment, the cover plate 180 is thicker in the middle of the X-Y plane, and the curved side cover is thinner. That is, the first zone I is located in the middle of the second zone II and is surrounded by the second zone II. However, in other embodiments, the cover plate 180 may also have a wave shape or other shape, and the relative positions of the first area I and the second area II of the cover plate 180 are not limited.

FIG. 3B is another partial cross-sectional view of the touch panel 30 according to an embodiment of the invention. Please refer to FIG. 3B , which is cut along the direction of the second sensing electrode 325 of the vertical touch panel 30 , so only a partial cross section of the second sensing electrode 325 is seen, and a part of the structure is omitted. The touch panel 30 is similar to the touch panel 10 of the first embodiment, and the same components are denoted by the same reference numerals and will not be described again. In this embodiment, the width of the third sub-electrode 3262 is W21, the width of the fourth sub-electrode 3282 is W22, and the width W21 is greater than the width W22. In other words, the third sub-electrode 3262 and the fourth sub-electricity The size of the pole 3282 is related to the non-uniform thickness of the cover plate 180.

FIG. 3C is another partial cross-sectional view of the touch panel 30 according to an embodiment of the invention. Please refer to FIG. 3C , which is cut along the staggered direction of the first sensing electrode 320 and the second sensing electrode 325 of the touch panel 30 , so that the first sensing electrode 320 and the second sensing electrode can be simultaneously seen. Partial profile of 325. The touch panel 30 is similar to the touch panel 10 of the first embodiment, and the same components are denoted by the same reference numerals and will not be described again.

As shown in FIG. 3C, the pitch of the second sub-electrode 3242 and the fourth sub-electrode 3282 is S5, and the distance between the first sub-electrode 3222 and the third sub-electrode 3262 is S6, and the pitch S5 is greater than the pitch S6. In other words, the spacing between the first sub-electrode 3222, the second sub-electrode 3242, the third sub-electrode 3262, and the fourth sub-electrode 3282 is also related to the non-uniform thickness of the cap plate 180.

FIG. 3D is a top view of the touch panel 30 according to an embodiment of the invention. Referring to FIGS. 3A-3D, a partial cross-sectional view of the touch panel 30 of FIG. 3A is shown, for example, by a section cut by a tangent 5-5 of FIG. 3D. The section structure cut by the tangent 6-6 of the 3D drawing is similar to that of Fig. 2A, and will not be described here. A partial cross-sectional view of the touch panel 30 of FIG. 3B is, for example, a cross-sectional structure cut by a tangent 7-7 of the 3D drawing. A partial cross-sectional view of the touch panel 30 of FIG. 3C is, for example, depicted by a section cut by a tangent 8-8 of FIG. 3D. Only the substrate 100, the first sensing electrode 320 and the second sensing electrode 325 of the touch panel 30 are shown in FIG. 3D for convenience of description.

The touch panel 30 is similar to the touch panel 20 of FIG. 2C. The same components are denoted by the same reference numerals, and the details are not described here. The difference is that the first sensing electrodes 320 and the second sensing electrodes 325 are arranged differently. Please refer to section 3D The first sensing electrodes 320 are disposed on the substrate 100 and arranged in a first direction X. The second sensing electrodes 325 are disposed on the substrate 100 and arranged in a second direction Y.

The first sensing electrode 320 can include a first sub-electrode 3222, a first connection line 3224, a second sub-electrode 3242, and a second connection 3244. The first connection line 3224 is configured to electrically connect the adjacent first sub-electrode 3222. The second connection 3244 is configured to electrically connect the adjacent second sub-electrodes 3242. The second sensing electrode 325 can include a third sub-electrode 3262, a third connection 3264, a fourth sub-electrode 3282, and a fourth connection 3284. The third connection 3264 is configured to electrically connect the adjacent third sub-electrode 3262. The fourth connection 3284 is used to electrically connect the adjacent fourth sub-electrode 3282.

The first sub-electrode 3222 and the second sub-electrode 3242 are, for example, rhombic, and the third sub-electrode 3262 and the fourth sub-electrode 3282 are, for example, hexagonal. Four symmetrical triangular electrodes 3226 and triangular electrodes 3246 may be respectively disposed around the third sub-electrode 3262 and the fourth sub-electrode 3282. In one embodiment, the triangular electrode 3226 and the triangular electrode 3246 may not be provided, and are not limited. As shown in FIG. 3D, the diagonal width of the first sub-electrode 3222 is, for example, W11, the diagonal width of the second sub-electrode 3242 is, for example, W12, and the width of the third sub-electrode 3262 is, for example, W21, and the fourth sub- The width of the electrode 3282 is, for example, W22, and the width W11 is greater than the width W12, and the width W21 is greater than the width W22. The surface area A31 of the first sub-electrode 3222 is greater than the surface area A32 of the second sub-electrode 3242, and the surface area A33 of the third sub-electrode 3262 is greater than the surface area A34 of the fourth sub-electrode 3282. The first sub-electrode 3222, the second sub-electrode 3242, the third sub-electrode 3262, and the fourth sub-electrode 3282 are, for example, transparent electrodes.

Referring to FIGS. 3A-3D simultaneously, the surface areas of the first sensing electrode 320 and the second sensing electrode 325 are related to the non-uniform thickness of the cover plate 180. For example, the cover plate may include a first zone I and a second zone II, the thickness of the first zone I being, for example, L1, the thickness of the second zone II being, for example, L2, and the thickness L1 being greater than the thickness L2. The first region I of the cover covers the first sub-electrode 3222 and the third sub-electrode 3262, for example, and the second region II of the cover covers the second sub-electrode 3242 and the fourth sub-electrode 3282, for example.

In this embodiment, the cover plate 180 is a thicker curved cover plate with a thinner outer portion, and the second zone II is located at the periphery of the first zone I. However, in other embodiments, the cover plate 180 may also have a wave shape or other shape, and the relative positions of the first area I and the second area II of the cover plate 180 are not limited as long as the first sensing electrodes 320 and the second The surface area of the sensing electrode 325 may vary depending on the non-uniform thickness of the cover plate 180.

Fourth embodiment

FIG. 4A is a partial cross-sectional view of the touch panel 40 according to an embodiment of the invention. Referring to FIG. 4A , the touch panel 40 includes a substrate 100 , a first sensing electrode 425 , a second sensing electrode 420 , an insulating layer 440 , a protective layer 160 , an adhesive layer 165 , and a cover plate 180 . The second sensing electrode 420 is disposed on the substrate 100. The insulating layer 440 is disposed on the second sensing electrode 420, and the first sensing electrode 425 is disposed on the insulating layer 440. The protective layer 160 is disposed on the first sensing electrode 425. The protective layer 160, the adhesive layer 165, and the cover plate 180 may be the same as or similar to the foregoing embodiments, and details are not described herein.

FIG. 4B is a top view of the touch panel 40 according to an embodiment of the invention. FIG. 4A is a partial cross-sectional view of the touch panel 40, for example, The cross section cut by the tangent 9-9 of Fig. 4B is shown. Only the substrate 100 of the touch panel 40, the first sensing electrode 425 and the second sensing electrode 420 are shown here for convenience of description. Referring to FIG. 4B , the first sensing electrode 425 and the second sensing electrode 420 of the touch panel 40 are, for example, rectangular or bar type strips. The first sensing electrodes 425 are disposed on the substrate 100 and arranged in a second direction Y. The second sensing electrodes 420 are disposed on the substrate 100 and arranged in a first direction X. The central axis distances of the adjacent two first sensing electrodes 425 are equal, and the central axes of the adjacent two second sensing electrodes 420 are equidistant.

As shown in FIG. 4B , the first sensing electrode 425 and the second sensing electrode 420 are, for example, rectangular or bar type strip-shaped transparent electrodes, and the first sensing electrode 425 and the second sensing electrode 420 . It can also be in the form of other strips and is not restricted. The first sensing electrode 425 may include a first sub-electrode 4222 and a second sub-electrode 4242. In one embodiment, the first sub-electrode 4222 has an opening C1, the second sub-electrode 4242 has an opening C2, and the shape of the opening C1 and the opening C2 is, for example, a rectangle, the width of the opening C1 is, for example, X1, and the width of the opening C2 is, for example, X2. . When the lengths of the first sub-electrode 4222 and the second sub-electrode 4242 are the same and the widths are E1 and E2, respectively, and the width E1 and the width E2 are the same, the surface area of the first sub-electrode 4222 is smaller than the surface area of the second sub-electrode 4242. .

Referring to FIGS. 4A and 4B simultaneously, the surface area of the first sensing electrode 425 is related to the non-uniform thickness of the cover plate 180. For example, the cover plate may include a first zone I, a second zone II, and a third zone III, the thickness of the first zone I being, for example, L1, the thickness of the second zone II and the third zone III being, for example, L2, and thickness L1 is greater than the thickness L2. The first area I of the cover covers, for example, the first sub-electricity The pole 4222, the second zone II and the third zone III of the cover cover the second sub-electrode 4242, for example. Here, the first sensing electrode 425 is compensated for by the non-uniform thickness of the cover plate 180. In another embodiment, the second sensing electrode 420 can also be compensated for by the non-uniform thickness of the cover plate 180.

In this embodiment, since the first region I of the thicker cover plate 180 mainly covers the first sub-electrode 4222 of the first sensing electrode 425, and the first sub-electrode 4222 has a larger opening C1, A plurality of edge capacitances can be induced between one of the sub-electrodes 4222 and the second sensing electrode 420, thereby compensating for the inductive capacitance which is reduced by the thick thickness of the cover plate 180.

Fifth embodiment

FIG. 5A is a top view of the touch panel 50 according to an embodiment of the invention. Referring to FIG. 5A , the touch panel 50 includes a substrate 100 , a first sensing electrode 525 , a second sensing electrode 520 , an insulating layer 540 , a protective layer 160 , an adhesive layer 165 , and a cover plate 180 . The second sensing electrode 520 is disposed on the substrate 100. The insulating layer 540 is disposed on the second sensing electrode 520, and the first sensing electrode 525 is disposed on the insulating layer 540. The protective layer 160 is disposed on the first sensing electrode 525. The protective layer 160, the adhesive layer 165, and the cover plate 180 may be the same as or similar to the foregoing embodiments, and details are not described herein.

FIG. 5B is a top view of the touch panel 50 according to an embodiment of the invention. A partial cross-sectional view of the touch panel 50 of FIG. 5A is, for example, a cross-section cut by a tangent 10-10 of FIG. 5B. Only the substrate 100 of the touch panel 50, the first sensing electrode 525 and the second sensing electrode 520 are shown here for convenience of description. Referring to FIG. 5B , the first sensing electrodes 525 of the touch panel 50 are, for example, elongated and arranged in a second direction Y. It is provided on the substrate 100. The second sensing electrodes 520 are arranged on the substrate 100 in a first direction X.

As shown in FIG. 5B, the first sensing electrode 525 is, for example, a strip-shaped transparent electrode having an arc-shaped side length, and the first sensing electrode 525 has a plurality of openings C3, and the shape of the opening C3 is, for example, a rectangle, and the opening C3 The size can be the same.

Referring to FIGS. 5A and 5B simultaneously, the width of the first sensing electrode 525 is not uniform. In an embodiment, the first sensing electrode 525 has at least a width F1 and a width F2, and the width F1 is smaller than the width F2. The surface area of the first sensing electrode 525 is related to the non-uniform thickness of the cover plate 180. For example, the thickness of the first region I of the cover plate 180 is, for example, L1, the thickness of the second region II and the third region III is, for example, L2, and the thickness L1 is greater than the thickness L2. The first region I of the cover plate 180 covers, for example, the first sensing electrode 525 having a width F1, and the second region II and the third region III of the cover plate 180 cover the first sensing electrode 525 having a width F2, for example. Here, the first sensing electrode 525 is compensated for by the non-uniform thickness of the cover plate 180. In another embodiment, the second sensing electrode 520 can also be compensated for by the non-uniform thickness of the cover plate 180.

In this embodiment, the first sensing electrode 525 covered by the first region I of the thicker cover plate 180 has a narrower width F1, so that the first sensing electrode 525 and the second sensing electrode 520 Inductive capacitance can be sensed to generate more induced capacitance, thereby compensating for the reduced inductive capacitance due to the thicker thickness of the first region I of the cover plate 180.

In summary, the area of the sensing electrode of the above embodiment of the present invention varies according to the thickness of the cover. In an embodiment, the cover is thicker The area can be compensated by a large area of sensing electrodes to increase the inductive capacitance. In another embodiment, the thicker area of the cover can be compensated by the hollowed out opening in the sensing electrode to increase the edge sensing capacitance. In another embodiment, the inductive capacitance can also be compensated by sensing the pitch of the sub-electrodes of the electrodes.

In conclusion, the present invention has been disclosed in the above preferred embodiments, and is not intended to limit the present invention. A person skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

10, 20, 30, 40, 50‧‧‧ touch panels

100‧‧‧Substrate

120, 125, 220, 225, 320, 325, 420, 425, 520, 525 ‧ ‧ sensing electrodes

140, 340, 440, 540‧‧ ‧ insulation

160‧‧‧Protective layer

165‧‧ ‧ adhesive layer

180‧‧‧ cover

1222, 1242, 1262, 1282, 2222, 2242, 2262, 2282, 3222, 3242, 3262, 3282, 4222, 4242‧‧

1224, 1244, 1264, 1284, 2224, 2244, 2264, 2284, 3224, 3244, 3264, 3284‧‧‧ Connection

1-1, 2-2, 3-3, 4-4, 5-5, 6-6, 7-7, 8-8, 9-9, 10-10‧‧‧ tangent

Areas A11, A12, A13, A14, A21, A22, A23, A24, A31, A32, A33, A34‧‧

C1, C2, C3‧‧‧ openings

E1, E2, F1, F2, X1, X2‧‧‧ width

L1, L2‧‧‧ thickness

L21, L22‧‧‧ length

S1, S2, S3, S4, S5, S6‧‧‧ spacing

W1, W2, W11, W12, W21, W22‧‧‧ width

District I, II, III‧‧

X, Y‧‧ direction

FIG. 1A is a partial cross-sectional view of a touch panel according to an embodiment of the invention.

FIG. 1B is a top view of a touch panel according to an embodiment of the invention.

2A is a partial cross-sectional view of a touch panel in accordance with another embodiment of the present invention.

FIG. 2B is another partial cross-sectional view of the touch panel according to another embodiment of the present invention.

FIG. 2C is another partial cross-sectional view of the touch panel according to another embodiment of the present invention.

2D is a top view of a touch panel in accordance with another embodiment of the present invention.

FIG. 3A illustrates a process of a touch panel according to still another embodiment of the present invention. A schematic view of the section.

FIG. 3B is a partial cross-sectional view of the touch panel according to still another embodiment of the present invention.

FIG. 3C is a partial cross-sectional view of the touch panel according to still another embodiment of the present invention.

FIG. 3D is a top view of a touch panel according to still another embodiment of the present invention.

FIG. 4A is a partial cross-sectional view showing a touch panel according to still another embodiment of the present invention.

FIG. 4B is a top view of the touch panel according to an embodiment of the invention.

FIG. 5A is a partial cross-sectional view showing a touch panel according to still another embodiment of the present invention.

FIG. 5B is a top view of a touch panel according to still another embodiment of the present invention.

10‧‧‧Touch panel

100‧‧‧Substrate

120, 125‧‧‧ sensing electrodes

1222, 1242, 1262, 1282‧ ‧ sub-electrodes

1224, 1244, 1264, 1284‧‧‧ connection

1-1‧‧‧ tangent

A11, A12, A13, A14‧‧‧ area

S1, S2‧‧‧ spacing

W1, W2‧‧‧ width

X, Y‧‧ direction

Claims (18)

A touch panel includes: a substrate; a plurality of first sensing electrodes are disposed on the substrate and arranged in a first direction; a plurality of second sensing electrodes are disposed on the substrate, and The second direction is different from the second direction; an insulating layer is disposed between the first sensing electrodes and the second sensing electrodes; and a cover plate is disposed on the insulating layer The cover has a non-uniform thickness, wherein in the thicker region of the cover, the first sensing electrodes and the second sensing electrodes induce more capacitance. The touch panel of claim 1, wherein the first sensing electrodes comprise a plurality of first sub-electrodes and a plurality of second sub-electrodes, and the surface areas of the first sub-electrodes are larger than the first The surface area of the two sub-electrodes. The touch panel of claim 2, wherein the first sensing electrodes further comprise a plurality of first wires for electrically connecting the first sub-electrodes and the second sub-electrodes Two adjacent. The touch panel of claim 3, wherein the second sensing electrodes comprise a plurality of third sub-electrodes and a plurality of fourth sub-electrodes, and the second sensing electrodes further comprise a plurality of second The wire is electrically connected to the third sub-electrode and two adjacent ones of the fourth sub-electrodes. The touch panel of claim 2, wherein the cover plate comprises at least one of a first thickness value and a first a second region, wherein the first thickness value is greater than the second thickness value, the first region of the cover covers the first sub-electrode, and the second region of the cover covers the second Sub-electrode. The touch panel of claim 2, wherein the cover plate comprises at least a first region having a first thickness value and a second region having a second thickness value, the first thickness value being greater than The second thickness value, the first sub-electrodes covered by the first region of the cover have a first spacing, and the second sub-electrodes covered by the second region of the cover have a second sub-electrode a second pitch, the first pitch being less than the second pitch. The touch panel of claim 6, wherein the second sensing electrodes comprise a plurality of third sub-electrodes and a plurality of fourth sub-electrodes, the first region of the cover plate is adjacent to the cover The third sub-electrodes have a third pitch, and the second sub-electrodes covered by the second region of the cover have a fourth pitch, and the third pitch is smaller than the fourth pitch. The touch panel of claim 1, wherein the first sensing electrodes comprise at least one first sub-electrode and at least one second sub-electrode, the at least one first sub-electrode having a plurality of first openings The at least one second sub-electrode has a plurality of second openings, each of the first openings having a size greater than a size of each of the second openings. The touch panel of claim 8, wherein the cover plate comprises at least a first region having a first thickness value and a second region having a second thickness value, the first thickness value being greater than The second thickness value, the first region of the cover covers the at least one first sub-electrode, and the second region of the cover covers the at least one second sub-electrode. The touch panel of claim 8, wherein the touch panel The first openings and/or the second openings are rectangular. The touch panel of claim 1, wherein the first sensing electrodes and the second sensing electrodes are rectangular or diamond shaped. The touch panel of claim 1, wherein each of the first sensing electrodes has an elongated shape, and the elongated strip has an arcuate edge, and the width of each of the first sensing electrodes is The curvature of the curved edge is related. The touch panel of claim 12, wherein the cover has a central area, the non-uniform thickness of the cover is gradually thinned from the central area to a second area, and each of the first sensing electrodes corresponds to The central region of the cover has a first arc shape, and each of the first sensing electrodes has a second arc corresponding to the second region of the cover plate, and the curvature of the first arc is smaller than the second arc The curvature of the shape. The touch panel of claim 1, wherein each of the first sensing electrodes has an elongated shape, and the width of the elongated strip corresponds to the thickness of the cover plate. The touch panel of claim 14, wherein the cover has a central area and a second area, the non-uniform thickness of the cover is gradually thinned from the central area to the second area, and the strip The shape has a first width and a second width, the first width is greater than the second width, the central region covers the second width of the elongated strip, and the second region covers the elongated strip The first width. The touch panel of claim 1, wherein the cover has a central area and a second area, and the non-uniform thickness of the cover is gradually thinned from the central area to the second area, and each The surface area of the first sensing electrode is gradually increased from where it corresponds to the central region to correspond to the second region. The touch panel of claim 16, wherein the distance between each of the first sensing electrodes is gradually widened corresponding to the central region to correspond to the second region. The touch panel of claim 1, wherein the first sensing electrodes are rhombic or hexagonal, and the second sensing electrodes are rhombic or hexagonal.